Several congressional members send a letter to Google CEO Larry Page about concerns such as whether Google will use facial recognition technology with Glass.

Several members of Congress sent a letter to Google to ask about privacy concerns related to Google Glass, including how the company will prevent Glass from unintentionally collecting data without user consent.

"Because Google Glass has not yet been released and we are uncertain of Google's plans to incorporate privacy protections into the device, there are still a number of unanswered questions that we share," the Bi-Partisan Privacy Caucus, led by Rep. Joe Barton (R-Texas) wrote in a letter to Google CEO Larry Page.Eight members of Congress signed the letter, and they want information from Google by June 14. They cited specific examples of privacy issues in Google's history to support the concerns about privacy.One question the group wants answered is how Google plans to prevent Glass for unintentionally collecting data about users without their consent. They also want to know what proactive steps Google is taking to protect the privacy of non-users when Glass is in use, as well as whether Google has considered refining its privacy policy. And they're curious to find out how Glass will use facial-recognition technology and how much privacy is considered when approving new apps.Google Glass has received a lot of buzz, but its capabilities largely are limited at this point. Still, privacy and security are two of the major concerns for Google Glass, and at least one bar has already banned the use of the device. Users could seemingly videotape or photograph others without their knowledge, and it's unclear what provisions are in place to protect users' information, particularly as more developers create apps for the computing eyewear.Google GlassGoogle Glass Can Now Do More: Facebook, Twitter and Tumblr Apps Released for Glasses

Google might have been mum on its much-buzzed-about glasses on day one of its big Google I/O Developer's Conference, but today the company has announced a series of new Glass-based applications.Twitter, Facebook, Tumblr and Elle magazine all unveiled new applications for the connected glasses, which overlay digital information in the physical world. The Twitter, Facebook and Tumblr options all allow Glass wearers to share their photos on the respective social networks straight from the glasses.While the Facebook app is restricted at the moment to just sharing photos taken with the glasses, Twitter allows for that feature and some other notification options. The app will also allow you to see Twitter notifications and respond to messages."In addition to sharing photos, you can also keep up with the people you follow on Twitter through notifications — for mentions, DMs and Tweets from users for whom you've turned on notifications. As always, you can reply to, retweet or favorite these Tweets," Twitter engineering manager Shiv Ramamurthi said in a Twitter blog post today.

ABC News tried out the Facebook and Twitter apps and can report that they did work as promised. We snapped a photo on the glasses, tapped it once to share and then we were able to select the social network to share it with. However, installing the sharing-based apps are a bit clunky at the moment. You must install the apps from the Glass app on the phone and then enable sharing in the web-based Glass control panel.RELATED: A Guide and Video of Google GlassThe other new media apps like CNN and Elle are easier to get working. Similar to The New York Times app, both CNN and Elle show snippets of information from the respective publications. For instance, with the Elle app, users will receive text and photo-based updates throughout the day about fashion news.Google Glass is not yet available for purchase; instead, Google has begun selling an Explorer Edition for $1,500 to early adopters and software developers. At this week's Google conference the company is holding sessions teaching software makers how to make Glass applications, instructing developers about the software tools and suggesting the apps that aren't too distracting.Google told ABC News yesterday it plans to bring its new Hangouts appand more social functionality from its Google Plus network to Glass sometime soon. Google Plus is already deeply integrated into Glass -- you can share and see notifications from friends.